IF furnace usage recommendations (2)
IF furnace usage recommendations (2)
Correct selection of switch (cut) switch disconnects shunt capacitor, due to the arc between the switch static and moving contacts will cause the operation of overvoltage, in addition to the requirements of the cast (cut) switch capacity than the parallel capacitor bank About 35% of the capacity, it must also be a circuit breaker with high insulation recovery between contacts, small arc re-ignition, and good arc extinguishing performance.
To prevent harmonics in the IF furnace grid there are many harmonic sources exist, if the harmonics set at the outlet of the shunt capacitor is too large, if you directly put shunt capacitors, the harmonics in the IF grid will often make the harmonics larger, the IF furnace The safety of shunt capacitors poses a great threat.
Adopting a method of installing a series reactor can effectively suppress the occurrence of harmonic components and inrush current, and has a significant effect on ensuring the safe operation of the shunt capacitor. Where conditions permit, the harmonic components at the place where the parallel capacitor is installed should be tested in advance, and the capacity of the series reactor to be installed should be determined based on the test results.
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